image.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "image_png.h"
   6 #include "r_shadow.h"
   7
   8 int             image_width;
   9 int             image_height;
  10
  11 void Image_CopyAlphaFromBlueBGRA(unsigned char *outpixels, const unsigned char *inpixels, int w, int h)
  12 {
  13         int i, n;
  14         n = w * h;
  15         for(i = 0; i < n; ++i)
  16                 outpixels[4*i+3] = inpixels[4*i]; // blue channel
  17 }
  18
  19 #if 1
  20 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
  21 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  22 {
  23         int index, c, x, y;
  24         const unsigned char *in, *line;
  25         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
  26         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
  27
  28         for (c = 0; c < numoutputcomponents; c++)
  29                 if (outputinputcomponentindices[c] & 0x80000000)
  30                         break;
  31         if (c < numoutputcomponents)
  32         {
  33                 // special indices used
  34                 if (inputflipdiagonal)
  35                 {
  36                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  37                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
  38                                         for (c = 0; c < numoutputcomponents; c++)
  39                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  40                 }
  41                 else
  42                 {
  43                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  44                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
  45                                         for (c = 0; c < numoutputcomponents; c++)
  46                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  47                 }
  48         }
  49         else
  50         {
  51                 // special indices not used
  52                 if (inputflipdiagonal)
  53                 {
  54                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  55                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
  56                                         for (c = 0; c < numoutputcomponents; c++)
  57                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  58                 }
  59                 else
  60                 {
  61                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  62                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
  63                                         for (c = 0; c < numoutputcomponents; c++)
  64                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  65                 }
  66         }
  67 }
  68 #else
  69 // intentionally readable version
  70 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  71 {
  72         int index, c, x, y;
  73         const unsigned char *in, *inrow, *incolumn;
  74         if (inputflipdiagonal)
  75         {
  76                 for (x = 0;x < inputwidth;x++)
  77                 {
  78                         for (y = 0;y < inputheight;y++)
  79                         {
  80                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  81                                 for (c = 0;c < numoutputcomponents;c++)
  82                                 {
  83                                         index = outputinputcomponentindices[c];
  84                                         if (index & 0x80000000)
  85                                                 *outpixels++ = index;
  86                                         else
  87                                                 *outpixels++ = in[index];
  88                                 }
  89                         }
  90                 }
  91         }
  92         else
  93         {
  94                 for (y = 0;y < inputheight;y++)
  95                 {
  96                         for (x = 0;x < inputwidth;x++)
  97                         {
  98                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  99                                 for (c = 0;c < numoutputcomponents;c++)
 100                                 {
 101                                         index = outputinputcomponentindices[c];
 102                                         if (index & 0x80000000)
 103                                                 *outpixels++ = index;
 104                                         else
 105                                                 *outpixels++ = in[index];
 106                                 }
 107                         }
 108                 }
 109         }
 110 }
 111 #endif
 112
 113 void Image_GammaRemapRGB(const unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *gammab)
 114 {
 115         while (pixels--)
 116         {
 117                 out[0] = gammar[in[0]];
 118                 out[1] = gammag[in[1]];
 119                 out[2] = gammab[in[2]];
 120                 in += 3;
 121                 out += 3;
 122         }
 123 }
 124
 125 // note: pal must be 32bit color
 126 void Image_Copy8bitBGRA(const unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
 127 {
 128         int *iout = (int *)out;
 129         while (pixels >= 8)
 130         {
 131                 iout[0] = pal[in[0]];
 132                 iout[1] = pal[in[1]];
 133                 iout[2] = pal[in[2]];
 134                 iout[3] = pal[in[3]];
 135                 iout[4] = pal[in[4]];
 136                 iout[5] = pal[in[5]];
 137                 iout[6] = pal[in[6]];
 138                 iout[7] = pal[in[7]];
 139                 in += 8;
 140                 iout += 8;
 141                 pixels -= 8;
 142         }
 143         if (pixels & 4)
 144         {
 145                 iout[0] = pal[in[0]];
 146                 iout[1] = pal[in[1]];
 147                 iout[2] = pal[in[2]];
 148                 iout[3] = pal[in[3]];
 149                 in += 4;
 150                 iout += 4;
 151         }
 152         if (pixels & 2)
 153         {
 154                 iout[0] = pal[in[0]];
 155                 iout[1] = pal[in[1]];
 156                 in += 2;
 157                 iout += 2;
 158         }
 159         if (pixels & 1)
 160                 iout[0] = pal[in[0]];
 161 }
 162
 163 /*
 164 =================================================================
 165
 166   PCX Loading
 167
 168 =================================================================
 169 */
 170
 171 typedef struct pcx_s
 172 {
 173     char        manufacturer;
 174     char        version;
 175     char        encoding;
 176     char        bits_per_pixel;
 177     unsigned short      xmin,ymin,xmax,ymax;
 178     unsigned short      hres,vres;
 179     unsigned char       palette[48];
 180     char        reserved;
 181     char        color_planes;
 182     unsigned short      bytes_per_line;
 183     unsigned short      palette_type;
 184     char        filler[58];
 185 } pcx_t;
 186
 187 /*
 188 ============
 189 LoadPCX
 190 ============
 191 */
 192 unsigned char* LoadPCX_BGRA (const unsigned char *f, int filesize)
 193 {
 194         pcx_t pcx;
 195         unsigned char *a, *b, *image_buffer, *pbuf;
 196         const unsigned char *palette, *fin, *enddata;
 197         int x, y, x2, dataByte;
 198
 199         if (filesize < (int)sizeof(pcx) + 768)
 200         {
 201                 Con_Print("Bad pcx file\n");
 202                 return NULL;
 203         }
 204
 205         fin = f;
 206
 207         memcpy(&pcx, fin, sizeof(pcx));
 208         fin += sizeof(pcx);
 209
 210         // LordHavoc: big-endian support ported from QF newtree
 211         pcx.xmax = LittleShort (pcx.xmax);
 212         pcx.xmin = LittleShort (pcx.xmin);
 213         pcx.ymax = LittleShort (pcx.ymax);
 214         pcx.ymin = LittleShort (pcx.ymin);
 215         pcx.hres = LittleShort (pcx.hres);
 216         pcx.vres = LittleShort (pcx.vres);
 217         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 218         pcx.palette_type = LittleShort (pcx.palette_type);
 219
 220         image_width = pcx.xmax + 1 - pcx.xmin;
 221         image_height = pcx.ymax + 1 - pcx.ymin;
 222         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 223         {
 224                 Con_Print("Bad pcx file\n");
 225                 return NULL;
 226         }
 227
 228         palette = f + filesize - 768;
 229
 230         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 231         if (!image_buffer)
 232         {
 233                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 234                 return NULL;
 235         }
 236         pbuf = image_buffer + image_width*image_height*3;
 237         enddata = palette;
 238
 239         for (y = 0;y < image_height && fin < enddata;y++)
 240         {
 241                 a = pbuf + y * image_width;
 242                 for (x = 0;x < image_width && fin < enddata;)
 243                 {
 244                         dataByte = *fin++;
 245                         if(dataByte >= 0xC0)
 246                         {
 247                                 if (fin >= enddata)
 248                                         break;
 249                                 x2 = x + (dataByte & 0x3F);
 250                                 dataByte = *fin++;
 251                                 if (x2 > image_width)
 252                                         x2 = image_width; // technically an error
 253                                 while(x < x2)
 254                                         a[x++] = dataByte;
 255                         }
 256                         else
 257                                 a[x++] = dataByte;
 258                 }
 259                 while(x < image_width)
 260                         a[x++] = 0;
 261         }
 262
 263         a = image_buffer;
 264         b = pbuf;
 265
 266         for(x = 0;x < image_width*image_height;x++)
 267         {
 268                 y = *b++ * 3;
 269                 *a++ = palette[y+2];
 270                 *a++ = palette[y+1];
 271                 *a++ = palette[y];
 272                 *a++ = 255;
 273         }
 274
 275         return image_buffer;
 276 }
 277
 278 /*
 279 ============
 280 LoadPCX
 281 ============
 282 */
 283 qboolean LoadPCX_QWSkin(const unsigned char *f, int filesize, unsigned char *pixels, int outwidth, int outheight)
 284 {
 285         pcx_t pcx;
 286         unsigned char *a;
 287         const unsigned char *fin, *enddata;
 288         int x, y, x2, dataByte, pcxwidth, pcxheight;
 289
 290         if (filesize < (int)sizeof(pcx) + 768)
 291                 return false;
 292
 293         image_width = outwidth;
 294         image_height = outheight;
 295         fin = f;
 296
 297         memcpy(&pcx, fin, sizeof(pcx));
 298         fin += sizeof(pcx);
 299
 300         // LordHavoc: big-endian support ported from QF newtree
 301         pcx.xmax = LittleShort (pcx.xmax);
 302         pcx.xmin = LittleShort (pcx.xmin);
 303         pcx.ymax = LittleShort (pcx.ymax);
 304         pcx.ymin = LittleShort (pcx.ymin);
 305         pcx.hres = LittleShort (pcx.hres);
 306         pcx.vres = LittleShort (pcx.vres);
 307         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 308         pcx.palette_type = LittleShort (pcx.palette_type);
 309
 310         pcxwidth = pcx.xmax + 1 - pcx.xmin;
 311         pcxheight = pcx.ymax + 1 - pcx.ymin;
 312         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || pcxwidth > 4096 || pcxheight > 4096 || pcxwidth <= 0 || pcxheight <= 0)
 313                 return false;
 314
 315         enddata = f + filesize - 768;
 316
 317         for (y = 0;y < outheight && fin < enddata;y++)
 318         {
 319                 a = pixels + y * outwidth;
 320                 // pad the output with blank lines if needed
 321                 if (y >= pcxheight)
 322                 {
 323                         memset(a, 0, outwidth);
 324                         continue;
 325                 }
 326                 for (x = 0;x < pcxwidth;)
 327                 {
 328                         if (fin >= enddata)
 329                                 return false;
 330                         dataByte = *fin++;
 331                         if(dataByte >= 0xC0)
 332                         {
 333                                 x2 = x + (dataByte & 0x3F);
 334                                 if (fin >= enddata)
 335                                         return false;
 336                                 if (x2 > pcxwidth)
 337                                         return false;
 338                                 dataByte = *fin++;
 339                                 for (;x < x2;x++)
 340                                         if (x < outwidth)
 341                                                 a[x] = dataByte;
 342                         }
 343                         else
 344                         {
 345                                 if (x < outwidth) // truncate to destination width
 346                                         a[x] = dataByte;
 347                                 x++;
 348                         }
 349                 }
 350                 while(x < outwidth)
 351                         a[x++] = 0;
 352         }
 353
 354         return true;
 355 }
 356
 357 /*
 358 =========================================================
 359
 360 TARGA LOADING
 361
 362 =========================================================
 363 */
 364
 365 typedef struct _TargaHeader
 366 {
 367         unsigned char   id_length, colormap_type, image_type;
 368         unsigned short  colormap_index, colormap_length;
 369         unsigned char   colormap_size;
 370         unsigned short  x_origin, y_origin, width, height;
 371         unsigned char   pixel_size, attributes;
 372 }
 373 TargaHeader;
 374
 375 void PrintTargaHeader(TargaHeader *t)
 376 {
 377         Con_Printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
 378 }
 379
 380 /*
 381 =============
 382 LoadTGA
 383 =============
 384 */
 385 unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize)
 386 {
 387         int x, y, pix_inc, row_inci, runlen, alphabits;
 388         unsigned char *image_buffer;
 389         unsigned int *pixbufi;
 390         const unsigned char *fin, *enddata;
 391         TargaHeader targa_header;
 392         unsigned int palettei[256];
 393         union
 394         {
 395                 unsigned int i;
 396                 unsigned char b[4];
 397         }
 398         bgra;
 399
 400         if (filesize < 19)
 401                 return NULL;
 402
 403         enddata = f + filesize;
 404
 405         targa_header.id_length = f[0];
 406         targa_header.colormap_type = f[1];
 407         targa_header.image_type = f[2];
 408
 409         targa_header.colormap_index = f[3] + f[4] * 256;
 410         targa_header.colormap_length = f[5] + f[6] * 256;
 411         targa_header.colormap_size = f[7];
 412         targa_header.x_origin = f[8] + f[9] * 256;
 413         targa_header.y_origin = f[10] + f[11] * 256;
 414         targa_header.width = image_width = f[12] + f[13] * 256;
 415         targa_header.height = image_height = f[14] + f[15] * 256;
 416         targa_header.pixel_size = f[16];
 417         targa_header.attributes = f[17];
 418
 419         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 420         {
 421                 Con_Print("LoadTGA: invalid size\n");
 422                 PrintTargaHeader(&targa_header);
 423                 return NULL;
 424         }
 425
 426         // advance to end of header
 427         fin = f + 18;
 428
 429         // skip TARGA image comment (usually 0 bytes)
 430         fin += targa_header.id_length;
 431
 432         // read/skip the colormap if present (note: according to the TARGA spec it
 433         // can be present even on truecolor or greyscale images, just not used by
 434         // the image data)
 435         if (targa_header.colormap_type)
 436         {
 437                 if (targa_header.colormap_length > 256)
 438                 {
 439                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 440                         PrintTargaHeader(&targa_header);
 441                         return NULL;
 442                 }
 443                 if (targa_header.colormap_index)
 444                 {
 445                         Con_Print("LoadTGA: colormap_index not supported\n");
 446                         PrintTargaHeader(&targa_header);
 447                         return NULL;
 448                 }
 449                 if (targa_header.colormap_size == 24)
 450                 {
 451                         for (x = 0;x < targa_header.colormap_length;x++)
 452                         {
 453                                 bgra.b[0] = *fin++;
 454                                 bgra.b[1] = *fin++;
 455                                 bgra.b[2] = *fin++;
 456                                 bgra.b[3] = 255;
 457                                 palettei[x] = bgra.i;
 458                         }
 459                 }
 460                 else if (targa_header.colormap_size == 32)
 461                 {
 462                         memcpy(palettei, fin, targa_header.colormap_length*4);
 463                         fin += targa_header.colormap_length * 4;
 464                 }
 465                 else
 466                 {
 467                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 468                         PrintTargaHeader(&targa_header);
 469                         return NULL;
 470                 }
 471         }
 472
 473         // check our pixel_size restrictions according to image_type
 474         switch (targa_header.image_type & ~8)
 475         {
 476         case 2:
 477                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 478                 {
 479                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 480                         PrintTargaHeader(&targa_header);
 481                         return NULL;
 482                 }
 483                 break;
 484         case 3:
 485                 // set up a palette to make the loader easier
 486                 for (x = 0;x < 256;x++)
 487                 {
 488                         bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
 489                         bgra.b[3] = 255;
 490                         palettei[x] = bgra.i;
 491                 }
 492                 // fall through to colormap case
 493         case 1:
 494                 if (targa_header.pixel_size != 8)
 495                 {
 496                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 497                         PrintTargaHeader(&targa_header);
 498                         return NULL;
 499                 }
 500                 break;
 501         default:
 502                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 503                 PrintTargaHeader(&targa_header);
 504                 return NULL;
 505         }
 506
 507         if (targa_header.attributes & 0x10)
 508         {
 509                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 510                 return NULL;
 511         }
 512
 513         // number of attribute bits per pixel, we only support 0 or 8
 514         alphabits = targa_header.attributes & 0x0F;
 515         if (alphabits != 8 && alphabits != 0)
 516         {
 517                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 518                 return NULL;
 519         }
 520
 521         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 522         if (!image_buffer)
 523         {
 524                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 525                 return NULL;
 526         }
 527
 528         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 529         if ((targa_header.attributes & 0x20) == 0)
 530         {
 531                 pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
 532                 row_inci = -image_width*2;
 533         }
 534         else
 535         {
 536                 pixbufi = (unsigned int*)image_buffer;
 537                 row_inci = 0;
 538         }
 539
 540         x = 0;
 541         y = 0;
 542         pix_inc = 1;
 543         if ((targa_header.image_type & ~8) == 2)
 544                 pix_inc = (targa_header.pixel_size + 7) / 8;
 545         switch (targa_header.image_type)
 546         {
 547         case 1: // colormapped, uncompressed
 548         case 3: // greyscale, uncompressed
 549                 if (fin + image_width * image_height * pix_inc > enddata)
 550                         break;
 551                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 552                         for (x = 0;x < image_width;x++)
 553                                 *pixbufi++ = palettei[*fin++];
 554                 break;
 555         case 2:
 556                 // BGR or BGRA, uncompressed
 557                 if (fin + image_width * image_height * pix_inc > enddata)
 558                         break;
 559                 if (targa_header.pixel_size == 32 && alphabits)
 560                 {
 561                         for (y = 0;y < image_height;y++)
 562                                 memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
 563                 }
 564                 else
 565                 {
 566                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 567                         {
 568                                 for (x = 0;x < image_width;x++, fin += pix_inc)
 569                                 {
 570                                         bgra.b[0] = fin[0];
 571                                         bgra.b[1] = fin[1];
 572                                         bgra.b[2] = fin[2];
 573                                         bgra.b[3] = 255;
 574                                         *pixbufi++ = bgra.i;
 575                                 }
 576                         }
 577                 }
 578                 break;
 579         case 9: // colormapped, RLE
 580         case 11: // greyscale, RLE
 581                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 582                 {
 583                         for (x = 0;x < image_width;)
 584                         {
 585                                 if (fin >= enddata)
 586                                         break; // error - truncated file
 587                                 runlen = *fin++;
 588                                 if (runlen & 0x80)
 589                                 {
 590                                         // RLE - all pixels the same color
 591                                         runlen += 1 - 0x80;
 592                                         if (fin + pix_inc > enddata)
 593                                                 break; // error - truncated file
 594                                         if (x + runlen > image_width)
 595                                                 break; // error - line exceeds width
 596                                         bgra.i = palettei[*fin++];
 597                                         for (;runlen--;x++)
 598                                                 *pixbufi++ = bgra.i;
 599                                 }
 600                                 else
 601                                 {
 602                                         // uncompressed - all pixels different color
 603                                         runlen++;
 604                                         if (fin + pix_inc * runlen > enddata)
 605                                                 break; // error - truncated file
 606                                         if (x + runlen > image_width)
 607                                                 break; // error - line exceeds width
 608                                         for (;runlen--;x++)
 609                                                 *pixbufi++ = palettei[*fin++];
 610                                 }
 611                         }
 612                 }
 613                 break;
 614         case 10:
 615                 // BGR or BGRA, RLE
 616                 if (targa_header.pixel_size == 32 && alphabits)
 617                 {
 618                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 619                         {
 620                                 for (x = 0;x < image_width;)
 621                                 {
 622                                         if (fin >= enddata)
 623                                                 break; // error - truncated file
 624                                         runlen = *fin++;
 625                                         if (runlen & 0x80)
 626                                         {
 627                                                 // RLE - all pixels the same color
 628                                                 runlen += 1 - 0x80;
 629                                                 if (fin + pix_inc > enddata)
 630                                                         break; // error - truncated file
 631                                                 if (x + runlen > image_width)
 632                                                         break; // error - line exceeds width
 633                                                 bgra.b[0] = fin[0];
 634                                                 bgra.b[1] = fin[1];
 635                                                 bgra.b[2] = fin[2];
 636                                                 bgra.b[3] = fin[3];
 637                                                 fin += pix_inc;
 638                                                 for (;runlen--;x++)
 639                                                         *pixbufi++ = bgra.i;
 640                                         }
 641                                         else
 642                                         {
 643                                                 // uncompressed - all pixels different color
 644                                                 runlen++;
 645                                                 if (fin + pix_inc * runlen > enddata)
 646                                                         break; // error - truncated file
 647                                                 if (x + runlen > image_width)
 648                                                         break; // error - line exceeds width
 649                                                 for (;runlen--;x++)
 650                                                 {
 651                                                         bgra.b[0] = fin[0];
 652                                                         bgra.b[1] = fin[1];
 653                                                         bgra.b[2] = fin[2];
 654                                                         bgra.b[3] = fin[3];
 655                                                         fin += pix_inc;
 656                                                         *pixbufi++ = bgra.i;
 657                                                 }
 658                                         }
 659                                 }
 660                         }
 661                 }
 662                 else
 663                 {
 664                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 665                         {
 666                                 for (x = 0;x < image_width;)
 667                                 {
 668                                         if (fin >= enddata)
 669                                                 break; // error - truncated file
 670                                         runlen = *fin++;
 671                                         if (runlen & 0x80)
 672                                         {
 673                                                 // RLE - all pixels the same color
 674                                                 runlen += 1 - 0x80;
 675                                                 if (fin + pix_inc > enddata)
 676                                                         break; // error - truncated file
 677                                                 if (x + runlen > image_width)
 678                                                         break; // error - line exceeds width
 679                                                 bgra.b[0] = fin[0];
 680                                                 bgra.b[1] = fin[1];
 681                                                 bgra.b[2] = fin[2];
 682                                                 bgra.b[3] = 255;
 683                                                 fin += pix_inc;
 684                                                 for (;runlen--;x++)
 685                                                         *pixbufi++ = bgra.i;
 686                                         }
 687                                         else
 688                                         {
 689                                                 // uncompressed - all pixels different color
 690                                                 runlen++;
 691                                                 if (fin + pix_inc * runlen > enddata)
 692                                                         break; // error - truncated file
 693                                                 if (x + runlen > image_width)
 694                                                         break; // error - line exceeds width
 695                                                 for (;runlen--;x++)
 696                                                 {
 697                                                         bgra.b[0] = fin[0];
 698                                                         bgra.b[1] = fin[1];
 699                                                         bgra.b[2] = fin[2];
 700                                                         bgra.b[3] = 255;
 701                                                         fin += pix_inc;
 702                                                         *pixbufi++ = bgra.i;
 703                                                 }
 704                                         }
 705                                 }
 706                         }
 707                 }
 708                 break;
 709         default:
 710                 // unknown image_type
 711                 break;
 712         }
 713
 714         return image_buffer;
 715 }
 716
 717 typedef struct q2wal_s
 718 {
 719         char            name[32];
 720         unsigned        width, height;
 721         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 722         char            animname[32];                   // next frame in animation chain
 723         int                     flags;
 724         int                     contents;
 725         int                     value;
 726 } q2wal_t;
 727
 728 unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize)
 729 {
 730         unsigned char *image_buffer;
 731         const q2wal_t *inwal = (const q2wal_t *)f;
 732
 733         if (filesize < (int) sizeof(q2wal_t))
 734         {
 735                 Con_Print("LoadWAL: invalid WAL file\n");
 736                 return NULL;
 737         }
 738
 739         image_width = LittleLong(inwal->width);
 740         image_height = LittleLong(inwal->height);
 741         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 742         {
 743                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 744                 return NULL;
 745         }
 746
 747         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 748         {
 749                 Con_Print("LoadWAL: invalid WAL file\n");
 750                 return NULL;
 751         }
 752
 753         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 754         if (!image_buffer)
 755         {
 756                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
 757                 return NULL;
 758         }
 759         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
 760         return image_buffer;
 761 }
 762
 763
 764 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
 765 {
 766         const char *ext;
 767
 768         if (size_out == 0)
 769                 return;
 770
 771         ext = FS_FileExtension(in);
 772         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
 773                 FS_StripExtension(in, out, size_out);
 774         else
 775                 strlcpy(out, in, size_out);
 776 }
 777
 778 static unsigned char image_linearfromsrgb[256];
 779
 780 void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels)
 781 {
 782         int i;
 783         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
 784         if (!image_linearfromsrgb[255])
 785                 for (i = 0;i < 256;i++)
 786                         image_linearfromsrgb[i] = i < 11 ? (int)(i / 12.92f) : (int)(pow((i/256.0f + 0.055f)/1.0555f, 2.4)*256.0f);
 787         for (i = 0;i < numpixels;i++)
 788         {
 789                 pout[i*4+0] = image_linearfromsrgb[pin[i*4+0]];
 790                 pout[i*4+1] = image_linearfromsrgb[pin[i*4+1]];
 791                 pout[i*4+2] = image_linearfromsrgb[pin[i*4+2]];
 792                 pout[i*4+3] = pin[i*4+3];
 793         }
 794 }
 795
 796 typedef struct imageformat_s
 797 {
 798         const char *formatstring;
 799         unsigned char *(*loadfunc)(const unsigned char *f, int filesize);
 800 }
 801 imageformat_t;
 802
 803 // GAME_TENEBRAE only
 804 imageformat_t imageformats_tenebrae[] =
 805 {
 806         {"override/%s.tga", LoadTGA_BGRA},
 807         {"override/%s.png", PNG_LoadImage_BGRA},
 808         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 809         {"override/%s.pcx", LoadPCX_BGRA},
 810         {"%s.tga", LoadTGA_BGRA},
 811         {"%s.png", PNG_LoadImage_BGRA},
 812         {"%s.jpg", JPEG_LoadImage_BGRA},
 813         {"%s.pcx", LoadPCX_BGRA},
 814         {NULL, NULL}
 815 };
 816
 817 imageformat_t imageformats_nopath[] =
 818 {
 819         {"override/%s.tga", LoadTGA_BGRA},
 820         {"override/%s.png", PNG_LoadImage_BGRA},
 821         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 822         {"textures/%s.tga", LoadTGA_BGRA},
 823         {"textures/%s.png", PNG_LoadImage_BGRA},
 824         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
 825         {"%s.tga", LoadTGA_BGRA},
 826         {"%s.png", PNG_LoadImage_BGRA},
 827         {"%s.jpg", JPEG_LoadImage_BGRA},
 828         {"%s.pcx", LoadPCX_BGRA},
 829         {NULL, NULL}
 830 };
 831
 832 // GAME_DELUXEQUAKE only
 833 // VorteX: the point why i use such messy texture paths is
 834 // that GtkRadiant can't detect normal/gloss textures
 835 // and exclude them from texture browser
 836 // so i just use additional folder to store this textures
 837 imageformat_t imageformats_dq[] =
 838 {
 839         {"%s.tga", LoadTGA_BGRA},
 840         {"%s.jpg", JPEG_LoadImage_BGRA},
 841         {"texturemaps/%s.tga", LoadTGA_BGRA},
 842         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
 843         {NULL, NULL}
 844 };
 845
 846 imageformat_t imageformats_textures[] =
 847 {
 848         {"%s.tga", LoadTGA_BGRA},
 849         {"%s.png", PNG_LoadImage_BGRA},
 850         {"%s.jpg", JPEG_LoadImage_BGRA},
 851         {"%s.pcx", LoadPCX_BGRA},
 852         {"%s.wal", LoadWAL_BGRA},
 853         {NULL, NULL}
 854 };
 855
 856 imageformat_t imageformats_gfx[] =
 857 {
 858         {"%s.tga", LoadTGA_BGRA},
 859         {"%s.png", PNG_LoadImage_BGRA},
 860         {"%s.jpg", JPEG_LoadImage_BGRA},
 861         {"%s.pcx", LoadPCX_BGRA},
 862         {NULL, NULL}
 863 };
 864
 865 imageformat_t imageformats_other[] =
 866 {
 867         {"%s.tga", LoadTGA_BGRA},
 868         {"%s.png", PNG_LoadImage_BGRA},
 869         {"%s.jpg", JPEG_LoadImage_BGRA},
 870         {"%s.pcx", LoadPCX_BGRA},
 871         {NULL, NULL}
 872 };
 873
 874 int fixtransparentpixels(unsigned char *data, int w, int h);
 875 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans, qboolean convertsRGB)
 876 {
 877         fs_offset_t filesize;
 878         imageformat_t *firstformat, *format;
 879         unsigned char *f, *data = NULL, *data2 = NULL;
 880         char basename[MAX_QPATH], name[MAX_QPATH], name2[MAX_QPATH], *c;
 881         //if (developer_memorydebug.integer)
 882         //      Mem_CheckSentinelsGlobal();
 883         if (developer_texturelogging.integer)
 884                 Log_Printf("textures.log", "%s\n", filename);
 885         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
 886         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 887         for (c = basename;*c;c++)
 888                 if (*c == '*')
 889                         *c = '#';
 890         name[0] = 0;
 891         if (strchr(basename, '/'))
 892         {
 893                 int i;
 894                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 895                         name[i] = basename[i];
 896                 name[i] = 0;
 897         }
 898         if (gamemode == GAME_TENEBRAE)
 899                 firstformat = imageformats_tenebrae;
 900         else if (gamemode == GAME_DELUXEQUAKE)
 901                 firstformat = imageformats_dq;
 902         else if (!strcasecmp(name, "textures"))
 903                 firstformat = imageformats_textures;
 904         else if (!strcasecmp(name, "gfx"))
 905                 firstformat = imageformats_gfx;
 906         else if (!strchr(basename, '/'))
 907                 firstformat = imageformats_nopath;
 908         else
 909                 firstformat = imageformats_other;
 910         // now try all the formats in the selected list
 911         for (format = firstformat;format->formatstring;format++)
 912         {
 913                 dpsnprintf (name, sizeof(name), format->formatstring, basename);
 914                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 915                 if (f)
 916                 {
 917                         data = format->loadfunc(f, (int)filesize);
 918                         Mem_Free(f);
 919                         if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
 920                         {
 921                                 dpsnprintf (name2, sizeof(name2), format->formatstring, va("%s_alpha", basename));
 922                                 f = FS_LoadFile(name2, tempmempool, true, &filesize);
 923                                 if(f)
 924                                 {
 925                                         data2 = format->loadfunc(f, (int)filesize);
 926                                         Mem_Free(f);
 927                                         Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
 928                                         Mem_Free(data2);
 929                                 }
 930                         }
 931                         if (data)
 932                         {
 933                                 if (developer_loading.integer)
 934                                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 935                                 //if (developer_memorydebug.integer)
 936                                 //      Mem_CheckSentinelsGlobal();
 937                                 if(allowFixtrans && r_fixtrans_auto.integer)
 938                                 {
 939                                         int n = fixtransparentpixels(data, image_width, image_height);
 940                                         if(n)
 941                                         {
 942                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
 943                                                 if(r_fixtrans_auto.integer >= 2)
 944                                                 {
 945                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
 946                                                         Image_StripImageExtension(name, buf, sizeof(buf));
 947                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
 948                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
 949                                                         Con_Printf("- %s written.\n", outfilename);
 950                                                 }
 951                                         }
 952                                 }
 953                                 if (convertsRGB)
 954                                         Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
 955                                 return data;
 956                         }
 957                         else
 958                                 Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
 959                 }
 960         }
 961         if (complain)
 962         {
 963                 Con_Printf("Couldn't load %s using ", filename);
 964                 for (format = firstformat;format->formatstring;format++)
 965                 {
 966                         dpsnprintf (name, sizeof(name), format->formatstring, basename);
 967                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 968                 }
 969         }
 970
 971         // texture loading can take a while, so make sure we're sending keepalives
 972         CL_KeepaliveMessage(false);
 973
 974         //if (developer_memorydebug.integer)
 975         //      Mem_CheckSentinelsGlobal();
 976         return NULL;
 977 }
 978
 979 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean convertsRGB)
 980 {
 981         unsigned char *data;
 982         rtexture_t *rt;
 983         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, convertsRGB)))
 984                 return 0;
 985         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_BGRA, flags, NULL);
 986         Mem_Free(data);
 987         return rt;
 988 }
 989
 990 int fixtransparentpixels(unsigned char *data, int w, int h)
 991 {
 992         int const FIXTRANS_NEEDED = 1;
 993         int const FIXTRANS_HAS_L = 2;
 994         int const FIXTRANS_HAS_R = 4;
 995         int const FIXTRANS_HAS_U = 8;
 996         int const FIXTRANS_HAS_D = 16;
 997         int const FIXTRANS_FIXED = 32;
 998         unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
 999         int fixPixels = 0;
1000         int changedPixels = 0;
1001         int x, y;
1002
1003 #define FIXTRANS_PIXEL (y*w+x)
1004 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
1005 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
1006 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
1007 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
1008
1009         memset(fixMask, 0, w * h);
1010         for(y = 0; y < h; ++y)
1011                 for(x = 0; x < w; ++x)
1012                 {
1013                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
1014                         {
1015                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
1016                                 ++fixPixels;
1017                         }
1018                         else
1019                         {
1020                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1021                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1022                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1023                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1024                         }
1025                 }
1026         if(fixPixels == w * h)
1027                 return 0; // sorry, can't do anything about this
1028         while(fixPixels)
1029         {
1030                 for(y = 0; y < h; ++y)
1031                         for(x = 0; x < w; ++x)
1032                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
1033                                 {
1034                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
1035                                         unsigned char r, g, b, a, r0, g0, b0;
1036                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
1037                                         {
1038                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
1039                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
1040                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
1041                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
1042                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1043                                         }
1044                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
1045                                         {
1046                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
1047                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
1048                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
1049                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
1050                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1051                                         }
1052                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
1053                                         {
1054                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
1055                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
1056                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
1057                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
1058                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1059                                         }
1060                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
1061                                         {
1062                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
1063                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
1064                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
1065                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
1066                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1067                                         }
1068                                         if(!cnt)
1069                                                 continue;
1070                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
1071                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1072                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
1073                                         if(sumA)
1074                                         {
1075                                                 // there is a surrounding non-alpha pixel
1076                                                 r = (sumRA + sumA / 2) / sumA;
1077                                                 g = (sumGA + sumA / 2) / sumA;
1078                                                 b = (sumBA + sumA / 2) / sumA;
1079                                         }
1080                                         else
1081                                         {
1082                                                 // need to use a "regular" average
1083                                                 r = (sumR + cnt / 2) / cnt;
1084                                                 g = (sumG + cnt / 2) / cnt;
1085                                                 b = (sumB + cnt / 2) / cnt;
1086                                         }
1087                                         if(r != r0 || g != g0 || b != b0)
1088                                                 ++changedPixels;
1089                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
1090                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1091                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
1092                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1093                                 }
1094                 for(y = 0; y < h; ++y)
1095                         for(x = 0; x < w; ++x)
1096                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1097                                 {
1098                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1099                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1100                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1101                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1102                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1103                                         --fixPixels;
1104                                 }
1105         }
1106         return changedPixels;
1107 }
1108
1109 void Image_FixTransparentPixels_f(void)
1110 {
1111         const char *filename, *filename_pattern;
1112         fssearch_t *search;
1113         int i, n;
1114         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1115         unsigned char *data;
1116         if(Cmd_Argc() != 2)
1117         {
1118                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1119                 return;
1120         }
1121         filename_pattern = Cmd_Argv(1);
1122         search = FS_Search(filename_pattern, true, true);
1123         if(!search)
1124                 return;
1125         for(i = 0; i < search->numfilenames; ++i)
1126         {
1127                 filename = search->filenames[i];
1128                 Con_Printf("Processing %s... ", filename);
1129                 Image_StripImageExtension(filename, buf, sizeof(buf));
1130                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1131                 if(!(data = loadimagepixelsbgra(filename, true, false, false)))
1132                         return;
1133                 if((n = fixtransparentpixels(data, image_width, image_height)))
1134                 {
1135                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1136                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1137                 }
1138                 else
1139                         Con_Printf("unchanged.\n");
1140                 Mem_Free(data);
1141         }
1142         FS_FreeSearch(search);
1143 }
1144
1145 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
1146 {
1147         qboolean ret;
1148
1149         memset (buffer, 0, 18);
1150         buffer[2] = 2;          // uncompressed type
1151         buffer[12] = (width >> 0) & 0xFF;
1152         buffer[13] = (width >> 8) & 0xFF;
1153         buffer[14] = (height >> 0) & 0xFF;
1154         buffer[15] = (height >> 8) & 0xFF;
1155         buffer[16] = 24;        // pixel size
1156
1157         // swap rgb to bgr
1158         memcpy(buffer + 18, data, width*height*3);
1159         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
1160
1161         return ret;
1162 }
1163
1164 void Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1165 {
1166         int y;
1167         unsigned char *buffer, *out;
1168         const unsigned char *in, *end;
1169
1170         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1171
1172         memset (buffer, 0, 18);
1173         buffer[2] = 2;          // uncompressed type
1174         buffer[12] = (width >> 0) & 0xFF;
1175         buffer[13] = (width >> 8) & 0xFF;
1176         buffer[14] = (height >> 0) & 0xFF;
1177         buffer[15] = (height >> 8) & 0xFF;
1178
1179         for (y = 3;y < width*height*4;y += 4)
1180                 if (data[y] < 255)
1181                         break;
1182
1183         if (y < width*height*4)
1184         {
1185                 // save the alpha channel
1186                 buffer[16] = 32;        // pixel size
1187                 buffer[17] = 8; // 8 bits of alpha
1188
1189                 // flip upside down
1190                 out = buffer + 18;
1191                 for (y = height - 1;y >= 0;y--)
1192                 {
1193                         memcpy(out, data + y * width * 4, width * 4);
1194                         out += width*4;
1195                 }
1196         }
1197         else
1198         {
1199                 // save only the color channels
1200                 buffer[16] = 24;        // pixel size
1201                 buffer[17] = 0; // 8 bits of alpha
1202
1203                 // truncate bgra to bgr and flip upside down
1204                 out = buffer + 18;
1205                 for (y = height - 1;y >= 0;y--)
1206                 {
1207                         in = data + y * width * 4;
1208                         end = in + width * 4;
1209                         for (;in < end;in += 4)
1210                         {
1211                                 *out++ = in[0];
1212                                 *out++ = in[1];
1213                                 *out++ = in[2];
1214                         }
1215                 }
1216         }
1217         FS_WriteFile (filename, buffer, out - buffer);
1218
1219         Mem_Free(buffer);
1220 }
1221
1222 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1223 {
1224         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1225         fstep = (int) (inwidth*65536.0f/outwidth);
1226         endx = (inwidth-1);
1227         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1228         {
1229                 xi = f >> 16;
1230                 if (xi != oldx)
1231                 {
1232                         in += (xi - oldx) * 4;
1233                         oldx = xi;
1234                 }
1235                 if (xi < endx)
1236                 {
1237                         lerp = f & 0xFFFF;
1238                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1239                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1240                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1241                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1242                 }
1243                 else // last pixel of the line has no pixel to lerp to
1244                 {
1245                         *out++ = in[0];
1246                         *out++ = in[1];
1247                         *out++ = in[2];
1248                         *out++ = in[3];
1249                 }
1250         }
1251 }
1252
1253 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1254 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1255 {
1256         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1257         unsigned char *out;
1258         const unsigned char *inrow;
1259         unsigned char *resamplerow1;
1260         unsigned char *resamplerow2;
1261         out = (unsigned char *)outdata;
1262         fstep = (int) (inheight*65536.0f/outheight);
1263
1264         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1265         resamplerow2 = resamplerow1 + outwidth*4;
1266
1267         inrow = (const unsigned char *)indata;
1268         oldy = 0;
1269         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1270         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1271         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1272         {
1273                 yi = f >> 16;
1274                 if (yi < endy)
1275                 {
1276                         lerp = f & 0xFFFF;
1277                         if (yi != oldy)
1278                         {
1279                                 inrow = (unsigned char *)indata + inwidth4*yi;
1280                                 if (yi == oldy+1)
1281                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1282                                 else
1283                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1284                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1285                                 oldy = yi;
1286                         }
1287                         j = outwidth - 4;
1288                         while(j >= 0)
1289                         {
1290                                 LERPBYTE( 0);
1291                                 LERPBYTE( 1);
1292                                 LERPBYTE( 2);
1293                                 LERPBYTE( 3);
1294                                 LERPBYTE( 4);
1295                                 LERPBYTE( 5);
1296                                 LERPBYTE( 6);
1297                                 LERPBYTE( 7);
1298                                 LERPBYTE( 8);
1299                                 LERPBYTE( 9);
1300                                 LERPBYTE(10);
1301                                 LERPBYTE(11);
1302                                 LERPBYTE(12);
1303                                 LERPBYTE(13);
1304                                 LERPBYTE(14);
1305                                 LERPBYTE(15);
1306                                 out += 16;
1307                                 resamplerow1 += 16;
1308                                 resamplerow2 += 16;
1309                                 j -= 4;
1310                         }
1311                         if (j & 2)
1312                         {
1313                                 LERPBYTE( 0);
1314                                 LERPBYTE( 1);
1315                                 LERPBYTE( 2);
1316                                 LERPBYTE( 3);
1317                                 LERPBYTE( 4);
1318                                 LERPBYTE( 5);
1319                                 LERPBYTE( 6);
1320                                 LERPBYTE( 7);
1321                                 out += 8;
1322                                 resamplerow1 += 8;
1323                                 resamplerow2 += 8;
1324                         }
1325                         if (j & 1)
1326                         {
1327                                 LERPBYTE( 0);
1328                                 LERPBYTE( 1);
1329                                 LERPBYTE( 2);
1330                                 LERPBYTE( 3);
1331                                 out += 4;
1332                                 resamplerow1 += 4;
1333                                 resamplerow2 += 4;
1334                         }
1335                         resamplerow1 -= outwidth4;
1336                         resamplerow2 -= outwidth4;
1337                 }
1338                 else
1339                 {
1340                         if (yi != oldy)
1341                         {
1342                                 inrow = (unsigned char *)indata + inwidth4*yi;
1343                                 if (yi == oldy+1)
1344                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1345                                 else
1346                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1347                                 oldy = yi;
1348                         }
1349                         memcpy(out, resamplerow1, outwidth4);
1350                 }
1351         }
1352
1353         Mem_Free(resamplerow1);
1354         resamplerow1 = NULL;
1355         resamplerow2 = NULL;
1356 }
1357
1358 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1359 {
1360         int i, j;
1361         unsigned frac, fracstep;
1362         // relies on int being 4 bytes
1363         int *inrow, *out;
1364         out = (int *)outdata;
1365
1366         fracstep = inwidth*0x10000/outwidth;
1367         for (i = 0;i < outheight;i++)
1368         {
1369                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1370                 frac = fracstep >> 1;
1371                 j = outwidth - 4;
1372                 while (j >= 0)
1373                 {
1374                         out[0] = inrow[frac >> 16];frac += fracstep;
1375                         out[1] = inrow[frac >> 16];frac += fracstep;
1376                         out[2] = inrow[frac >> 16];frac += fracstep;
1377                         out[3] = inrow[frac >> 16];frac += fracstep;
1378                         out += 4;
1379                         j -= 4;
1380                 }
1381                 if (j & 2)
1382                 {
1383                         out[0] = inrow[frac >> 16];frac += fracstep;
1384                         out[1] = inrow[frac >> 16];frac += fracstep;
1385                         out += 2;
1386                 }
1387                 if (j & 1)
1388                 {
1389                         out[0] = inrow[frac >> 16];frac += fracstep;
1390                         out += 1;
1391                 }
1392         }
1393 }
1394
1395 /*
1396 ================
1397 Image_Resample
1398 ================
1399 */
1400 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1401 {
1402         if (indepth != 1 || outdepth != 1)
1403         {
1404                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1405                 return;
1406         }
1407         if (quality)
1408                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1409         else
1410                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1411 }
1412
1413 // in can be the same as out
1414 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1415 {
1416         const unsigned char *inrow;
1417         int x, y, nextrow;
1418         if (*depth != 1 || destdepth != 1)
1419         {
1420                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1421                 if (*width > destwidth)
1422                         *width >>= 1;
1423                 if (*height > destheight)
1424                         *height >>= 1;
1425                 if (*depth > destdepth)
1426                         *depth >>= 1;
1427                 return;
1428         }
1429         // note: if given odd width/height this discards the last row/column of
1430         // pixels, rather than doing a proper box-filter scale down
1431         inrow = in;
1432         nextrow = *width * 4;
1433         if (*width > destwidth)
1434         {
1435                 *width >>= 1;
1436                 if (*height > destheight)
1437                 {
1438                         // reduce both
1439                         *height >>= 1;
1440                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1441                         {
1442                                 for (in = inrow, x = 0;x < *width;x++)
1443                                 {
1444                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1445                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1446                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1447                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1448                                         out += 4;
1449                                         in += 8;
1450                                 }
1451                         }
1452                 }
1453                 else
1454                 {
1455                         // reduce width
1456                         for (y = 0;y < *height;y++, inrow += nextrow)
1457                         {
1458                                 for (in = inrow, x = 0;x < *width;x++)
1459                                 {
1460                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1461                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1462                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1463                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1464                                         out += 4;
1465                                         in += 8;
1466                                 }
1467                         }
1468                 }
1469         }
1470         else
1471         {
1472                 if (*height > destheight)
1473                 {
1474                         // reduce height
1475                         *height >>= 1;
1476                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1477                         {
1478                                 for (in = inrow, x = 0;x < *width;x++)
1479                                 {
1480                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1481                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1482                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1483                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1484                                         out += 4;
1485                                         in += 4;
1486                                 }
1487                         }
1488                 }
1489                 else
1490                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1491         }
1492 }
1493
1494 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1495 {
1496         int x, y, x1, x2, y1, y2;
1497         const unsigned char *b, *row[3];
1498         int p[5];
1499         unsigned char *out;
1500         float ibumpscale, n[3];
1501         ibumpscale = (255.0f * 6.0f) / bumpscale;
1502         out = outpixels;
1503         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1504         {
1505                 y2 = y + 1;if (y2 >= height) y2 = 0;
1506                 row[0] = inpixels + (y1 * width) * 4;
1507                 row[1] = inpixels + (y  * width) * 4;
1508                 row[2] = inpixels + (y2 * width) * 4;
1509                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1510                 {
1511                         x2 = x + 1;if (x2 >= width) x2 = 0;
1512                         // left, right
1513                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1514                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1515                         // above, below
1516                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1517                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1518                         // center
1519                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1520                         // calculate a normal from the slopes
1521                         n[0] = p[0] - p[1];
1522                         n[1] = p[3] - p[2];
1523                         n[2] = ibumpscale;
1524                         VectorNormalize(n);
1525                         // turn it into a dot3 rgb vector texture
1526                         out[2] = (int)(128.0f + n[0] * 127.0f);
1527                         out[1] = (int)(128.0f + n[1] * 127.0f);
1528                         out[0] = (int)(128.0f + n[2] * 127.0f);
1529                         out[3] = (p[4]) / 3;
1530                         out += 4;
1531                 }
1532         }
1533 }